Wiki source code of Remote Access Gateway

Version 6.3 by Xiaoling on 2022/05/27 10:58
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1 **Contents:**
2
3 {{toc/}}
4
5
6 = 1. Use Remote.it service =
7
8 Remote.it for remote access is available in the latest Dragino firmware for gateway. For security concern, the remote.it only available base on end user demand.
9
10 (% style="color:red" %)**Important Notice:**
11
12 (% style="color:red" %)* **Remote.it access will give full control of your device to remote support.**
13 ~* **The Remote.it allow Dragino Support to remote access to the device, If user want to access himself, it need to sign up for an remote.it account.**
14
15 For how to use remoteit, please see : [[Remoteit user instruction for Dragino Gateway>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=Dragino-Remoteit_User_Manual.pdf]].
16
17
18 = 2. RSSH Introduction =
19
20 Reverse SSH for remote access is available in the latest Dragino firmware for gateway. For security concern, the RSSH only available base on end user demand.
21
22 (% style="color:red" %)**Important Notice:**
23
24 (% style="color:red" %)* **RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
25 ~* **This RSSH allow Dragino Support to remote access to the device, If user want to access himself, he need to set up the RSSH server himself.**
26
27 Below gateway support reverse SSH access:
28
29 * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
30 * LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
31 * LG02, OLG02
32 * LG308, DLOS8
33 * LPS8
34 * LIG16
35 * MS14 series if installed with the same firmware.
36
37 == 2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355 ==
38
39 === 2.1.1 End User Guide to use SSH access ===
40
41 Go to this the Reverse SSH page as below:
42
43 [[image:image-20220527102348-1.png]]
44
45 Get the RSSH configure page
46
47
48 [[image:image-20220527103251-2.png]]
49
50 Connection OK.
51
52 * (% style="color:#4f81bd" %)**Login ID**(%%): Input (% style="color:#4f81bd" %)**sshuser**
53 * (% style="color:#4f81bd" %)**Host Address**(%%): Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
54 * (% style="color:#4f81bd" %)**Host Port**(%%): Please email to support @ dragino.com to get a valid host port.
55 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
56 * (% style="color:#4f81bd" %)**Network Keys:**(%%)Click the Generate keys to generate the keys and download / mail it to Dragino support so Dragino can prepare the remote access to
57
58 (((
59 After doing above, please download and mail the public keys to Dragino support and wait for our mail for the valid host port. Input the valid host port got from our support and click connect so we can remote access to your gateway.
60 )))
61
62
63 === 2.1.2 How to Ser up a Reverse SSH access ===
64
65 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
66
67 1. Prepare a Linux server with public IP. The gateways need to be able to create SSH connection to this server. We recommend to use a server that performs no other function than to support the RSSH access, and to have no additional accounts active, and no access from the Internet that uses ID/password authentication.
68 1. In the gateway settings, The (% style="color:#4f81bd" %)**Login ID**(%%) will be the SSH user for this server and the (% style="color:#4f81bd" %)**Host Address**(%%) is the server address.
69 1. Ask your end user to send you the key generate in the gateway and put them in /home/<Login ID>/.ssh/authorized_key file.
70 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
71 1. In your server or other machine, you will able to access to the end user device by below command:
72
73 (% class="box" %)
74 (((
75 $ ssh   -p <End User Host Port>   root@<Host Address>
76 )))
77
78 (((
79 (% style="color:red" %)**Remote RSSH Access allow the gateway to connect to SSH server as well. This will create risk to the RSSH server. Please make sure the account use for Gateway Access has the lowest access right.**
80 )))
81
82
83 ==== 2.1.2.1 Note for set up RSSH server ====
84
85 If gateway reboot or the connection is incidentely close by end node. The port in SSH server will still be occupy for a long time. Administrator can use below commands to release the port.
86
87 (% class="box" %)
88 (((
89 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
90 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
91 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
92 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
93 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
94 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
95 )))
96
97
98 == 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
99
100 Below gateway support reverse SSH access:
101
102 (% class="box" %)
103 (((
104 Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
105 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
106 LG02, OLG02
107 LG308, DLOS8
108 LPS8
109 LIG16
110 )))
111
112
113 === 2.2.1 End User Guide to use SSH access ===
114
115 ==== 2.2.1.1 Install the SSH service for server ====
116
117 ===== 2.2.1.1.1 Step 1:Download the SSH service code =====
118
119 1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
120
121 [[image:image-20220527105447-1.png]]
122
123 git clone rssh-server
124
125
126 2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
127
128 [[image:image-20220527105511-2.png]]
129
130 Generate the execute file
131
132
133 **Debug** :
134
135 (% class="box" %)
136 (((
137 if you git fail.  ~-~->    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
138 please install git.  ~-~->  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
139 )))
140
141 (% class="box" %)
142 (((
143 if you make error 127,it** (% style="color:#4f81bd" %)lack of gcc.(%%)**
144 please install gcc.    ~-~->(% style="color:#4f81bd" %)**yum install gcc.**
145 )))
146
147 [[image:https://wiki.dragino.com/images/d/d7/Lack_of_gcc.png||height="174" width="434"]]
148
149 lack of gcc
150
151 (% class="box" %)
152 (((
153 if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
154 please insatell (% style="color:#4f81bd" %)**sqlite3**.
155 )))
156
157 [[image:https://wiki.dragino.com/images/thumb/9/93/Lack_of_sqlite3.png/500px-Lack_of_sqlite3.png||height="137" width="500"]]
158
159 lack of sqlite3
160
161 How to install Sqlit3
162
163 (% class="box" %)
164 (((
165 Step1: Download the SQLit3 installation package
166 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
167 Step2: tar the SQLit3 installation package
168 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
169 Step3: Generate the makefile
170 cd sqlite-autoconf-3350300/;./configure
171 Step4: Compile makefile
172 sudo make
173 Step5: Install makefile
174 sudo make install
175 Check:
176 cd /usr/local/bin;ls -al                             ~-~->    Check to see if there is a file for sqlite3
177 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->    Test whether the sqlite3 was installed successfully
178 debug:
179 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
180 Please execute the command /sbin/ldconfig.
181 After that execute the command ./sqlite3 test.db again.
182 )))
183
184
185 ===== 2.2.1.1.2 Step 2 :Install and run the RSS service =====
186
187 1):intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
188
189 user must enter the root account and run the following commands
190
191 (% class="box" %)
192 (((
193 $ ./create_sqlite3_db.sh
194 $ ./rssh_serv -p  3721 2>&1 &
195 $ ps -ef | grep rssh_serv check 3721 port
196 )))
197
198 [[image:https://wiki.dragino.com/images/thumb/c/cb/Intall_database_and_server_development_port.png/500px-Intall_database_and_server_development_port.png||height="70" width="500"]]
199
200 intall database and server development port
201
202 **Debug:**
203
204 (% class="box" %)
205 (((
206 Check /var/rsshdb.sqlite3 ~-~->(% class="mark" %)** ls /var/rsshdb.sqlite3**(%%)
207 Check ls /var/rsshdb.sqlite3 ~-~-> (% class="mark" %)**sudo chmod 777 rssh_serv**
208 )))
209
210 (% class="box" %)
211 (((
212 if** fail to open dpvlry or to bind to it**
213 please kill rssh_serv,and run (% class="mark" %)** ./rssh_serv -p  3721 2>&1 &** (%%) again
214 )))
215
216
217 ===== 2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway) =====
218
219 1):(% class="mark" %)**sudo useradd XXXXX**(%%) (custom user name)
220
221 2):(% class="mark" %)**sudo passwd xxxxxx**
222
223 3):(% class="mark" %)**cp /bin/bash /bin/rbash**
224
225 4):(% class="mark" %)**sudo nano /etc/passwd**(%%) ~-~-> Change /bin/bash to /bin/rbash
226
227 5):(% class="mark" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
228
229 6):(% class="mark" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
230
231 **Now user "XXXXX" is the user with limited permissions of the current system**
232
233
234 === 2.2.2 How does user get the gateway to connect to a user's private server ===
235
236 ===== 2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key =====
237
238 1)in the system ~-~-> (% class="mark" %)**Remote Mgmt/span>**
239
240 [[image:https://wiki.dragino.com/images/thumb/8/8f/Remote_Mgmt.png/500px-Remote_Mgmt.png||height="367" width="500"]]
241
242 Remote Mgmt
243
244
245 ===== 2.2.2.2 Step2: Authorization server =====
246
247 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
248
249 [[image:https://wiki.dragino.com/images/thumb/4/49/Publickey.png/500px-Publickey.png||height="81" width="500"]]
250
251 Publickey
252
253
254 ===== 2.2.2.3 Step3: connecte private server =====
255
256 in the gateway web UI
257
258 [[image:https://wiki.dragino.com/images/thumb/0/04/Gateway_web_UI.png/500px-Gateway_web_UI.png||height="389" width="500"]]
259
260 gateway web UI
261
262 (% class="box" %)
263 (((
264 (% class="mark" %)**Connection Type **(%%) : If user's least privileged user with private server uses a password, select (% class="mark" %)**Public Key**(%%)
265 **Note:if user's least privileged user no uses a password,choose from both is fine**
266 (% class="mark" %)**Login ID**(%%)             : Input user name "eg : "XXXXX"
267 (% class="mark" %)**Host Address**(%%)         : Input user's private server address
268 (% class="mark" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
269 Click Save and then Connect
270 )))
271
272
273 ===== 2.2.2.4 Step 4 :Cheak is fine =====
274
275 Rssh Host connection Ok
276
277 [[image:https://wiki.dragino.com/images/thumb/6/6f/Rssh_Host_connection_Ok.png/500px-Rssh_Host_connection_Ok.png||height="225" width="500"]]
278
279 Rssh Host connection Ok
280
281
282 user can use common ps | grep ssh to check it in the gateway.
283
284 [[image:https://wiki.dragino.com/images/thumb/a/ad/Check_the_gateway.png/500px-Check_the_gateway.png]]
285
286 Check the gateway
287
288
289 ===== 2.2.2.5 Step5:Create an authorization key file =====
290
291 1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
292
293 **Debug:**
294
295 (% class="box" %)
296 (((
297 check: sudo ls /home/xxxxx/.ssh/authorizedkey
298 )))
299
300 === 2.2.3 How to Ser up a Reverse SSH access ===
301
302 ==== 2.2.3.1 Step1: Log into the server system ====
303
304 [[image:https://wiki.dragino.com/images/thumb/2/26/Loging_server.png/500px-Loging_server.png||height="69" width="500"]]
305
306 Loging server
307
308
309 ==== 2.2.3.2 Step2:access the gateway ====
310
311 $ cd rssh-server/
312
313 Check the gateway linking to the server $ ./connect-gw.sh -l
314
315 [[image:https://wiki.dragino.com/images/thumb/e/ee/Check_gateway_link_server.png/500px-Check_gateway_link_server.png||height="157" width="500"]]
316
317 Check the gateway linking to the server
318
319
320 access the gateway $ ./connect-gw.sh <GWID>
321
322 [[image:https://wiki.dragino.com/images/thumb/b/b7/Reverse_ssh_access_the_gateway1.png/500px-Reverse_ssh_access_the_gateway1.png||height="230" width="500"]]
323
324 reverse ssh access the gateway

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